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After learning that regular briefs don't do the trick on long runs, I tried four different brands of running briefs and boxer/briefs. These are by far the most comfortable brief I have ever worn. They prevent chafing and are perfect in cold and hot weather. I can't believe I am writing a review on underwear! I am purchasing more!

Just did all 4 races at the Gasparilla Distance Classic in Tampa, FL. Wore these under my running shorts and had no chafing after covering 30.4 miles in two days! The last two years I had such bad chafing after the first day, I couldn't participate in the runs the following day. I highly recommend this product. Like someone else wrote, I can't believe I'm writing a review for underwear but this product is the answer to anyone who suffers from chafing on long runs! Get this product and end your suffering now!

I just bought these in hopes of finding a lower cost comparable to the under armour same style. I think these are just like the under armour but too soon to tell if they will last as long as under armour. They are thinner and a bit tighter at the opening of the thigh area. All in all I think they will be good for warm/hot weather running and everyday wear if you choose to do so.

I have been running in the longer RRS liner for a few year and love how well they keep the chafe monsters at bay. I was a little concerned about how much shorter the inseam was on this pair but that was unfounded. They still wick superbly, fit great and are quite durable. I have 4 pairs of these in my rotation and just had to throw two pairs away with holes after 1.5 year. Pretty good considering how much the seams rub together on a run.

Bought for Long runs to prevent chafing and to wick moisure and these didn't dissapoint. 20 Miler right out of the box. Best compliment is that I forgot I was wearing them. Surprisingly thin. Could even be worn as regular underwear, but I save them for my long runs.

These liners are comfortable, provide great support, and prevent chafing to perfection! I initially bought one pair just to try them out, but soon bought two more. I use them mostly for running but occasionally for biking as well. The material thickness, flexibility, and length suit my needs to a T.

Bought these for under my running shorts or tights for my last marathon. Have had a hard time finding underwear that are form fitting and tight enough so they don't bunch up under your legs or in your rear and cause chaffing. These are perfect. And they didn't tear after 2 uses like the Asics underwear that I got the last few times. These will last and are very comfortable. I'm a medium with 32" waist and these fit perfectly. I'm going to order a few more because you can't be the price or quality.

I was trying to find some underwear that would reduce friction as I ran and found these boxer briefs to be the perfect fit. They fit snug and provide a little bit of support but also breath and allow moisture to move away from my skin.Overall, a great product. The only trouble I had was that the size chart was a little off for me. I originally ordered Men's Medium but needed to exchange for the Men's Large to get the right fit.

These are perfect for a running base layer. The short length will work for all but the shortest of inseams. They are very lightweight and breathable. I wish they sold them in 2 packs, but you can't beat the price of these, especially if you have V.I.P. benefits.

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